Dormer Pramet C428 7.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing (HRA) Standard Length End Mill DIN 844 K

The Dormer Pramet C428 7.0 mm HSS‑E powder metallurgical end mill with Alcrona Primax coating is built for serious roughing work in demanding metals. It’s designed for machinists who need a reliable tool that handles shoulder milling, slot milling, and ramping with consistent results.

• Diameter: 7.0 mm
• Flutes: 4-flute geometry for efficient material removal
• Length of Cut: 16 mm
• Overall Length: 66 mm
• Shank: Weldon 10 mm with flatted shank for secure clamping and stable cutting
• Material & Coating: Powder-metallurgical HSS‑E substrate with Alcrona Primax coating for enhanced wear resistance and toughness
• Pitch & Helix: HRA asymmetrical fine-pitch profile with a 35° helix for efficient cutting action
• Rake Angle: 12° rake to improve chip evacuation and surface finish during shoulder milling and ramping
• Standards: DIN 844 K compatible geometry for broad holder compatibility
• Applications: Shoulder milling, slot milling, and ramping in alloy and tool steel, stainless steel, cast iron, copper/copper alloys, and high‑temperature alloys

This 7 mm end mill is engineered for durability and versatility. The Alcrona Primax coating reduces wear in continuous roughing passes, while the powder-metallurgical HSS‑E core provides toughness under demanding cutting conditions. The 4-flute design strikes a balance between aggressive material removal and a manageable finish, making it suitable for both heavy roughing and precise finishing prep in the same tool path. With a Weldon shank and flatted geometry, it stays securely in place even during high-feed milling, helping to minimize chatter and improve dimensional accuracy across a variety of metals.